Turbo pipe leak

[98fleetwood]

Is there a way to get this connection to 100% sealed?
I just noticed it is blowing a nice Breese at an idle.. mine does not have any type of gasket.. aluminum on aluminum with a stainless clamp..
Am I missing something??
98 5.9 24 valve

[Rob_M]

Originally Posted by 98fleetwood

Is there a way to get this connection to 100% sealed?
I just noticed it is blowing a nice Breese at an idle.. mine does not have any type of gasket.. aluminum on aluminum with a stainless clamp..
Am I missing something??
98 5.9 24 valveAttachment 353963

Take it apart and clean the carbon out. CAT makes some ceramic exhaust connection sealant. I don’t know the part number. Might need a new clamp?

Edit: duh, I see it’s the intake side. Surfaces have to meet flat and yes a new clamp may help as the taper on the old clamp may be spread out.

[Lowflyer1]

I don't see any witness marks for a leak, where is it? Did you just take it apart?
There is no gasket on that joint but appears that it is installed crooked, or is it just the camera angle?

[98fleetwood]

Originally Posted by Lowflyer1

I don't see any witness marks for a leak, where is it? Did you just take it apart?
There is no gasket on that joint but appears that it is installed crooked, or is it just the camera angle?

It is leaking out where the nut and bolt squeeze it together..
I agree it looks crooked.. I bought this coach melted down and tore apart.. 2500 miles now.. was making sure I wasn't missing some kind of gasket.. hopefully it's just not mating properly!
Thx

[98fleetwood]

Originally Posted by Rob_M

Take it apart and clean the carbon out. CAT makes some ceramic exhaust connection sealant. I don’t know the part number. Might need a new clamp?

Edit: duh, I see it’s the intake side. Surfaces have to meet flat and yes a new clamp may help as the taper on the old clamp may be spread out.

Is there a go to spot to get new clamps?
I know of atheist 1 more I would like to replace!
Thx

[mackwrench]

Try and tighten the clamp a little more....
If still leaking, take it apart and lightly clean the mating surfaces on both ends ....

Also sometimes these clamps stretch if someone went impact use on them, and need replacement


A leak there is a boost leak, so if you feel it at idle, it's a major leak under engine load.

You should be able to get that clamp at any heavy truck dealer or big truck parts place like Fleetpride

[0rion]

I would line it up and crank that clamp down a little tighter. Worst case you can get a v band clamp at almost any parts store.

[Unplanned Tourist]

If it has been run with it loose for a long time, likely the mating surfaces are damaged. You might be able to seal it with some sealant if it is damaged. At the least, put a new clamp on.

[wolfe10]

Yup, take it apart.


"Resurface" both halves-- Some wet dry sandpaper on a sheet of glass works well for the part you can remove.


Then make sure the two pieces are square before installing and tightening the clamp. If you need a new clamp, any parts house that caters to the OTR truck trade should have one in stock.

[Rob_M]

As mentioned if you can feel it leak at idle it’s a major leak under power and you should see some major gain in horsepower when you get it sealed up.

[CountryB]

Originally Posted by Rob_M

As mentioned if you can feel it leak at idle it’s a major leak under power and you should see some major gain in horsepower when you get it sealed up.

When you buy the clamp pay attention to the dimension "C" in the photo. If you get one that is too large it wont seal. Possibly the last guy that worked on your turbo used the wrong clamp.

[Lowflyer1]

Originally Posted by CountryB

When you buy the clamp pay attention to the dimension "C" in the photo. If you get one that is too large it wont seal. Possibly the last guy that worked on your turbo used the wrong clamp.

Is there a way to determine what dimension C needs to be unless you pull the old clamp out and measure while the pipe is still there?
Doesn't the tube dia & dim B (diameter at the flare) determine that?

A note of caution to OP, that clamp has a pretty small bolt and can't take much torque. When I removed the old exhaust, that bolt snapped right off without hardly any effort.
I took the old clamp to Fleetpride and they got me a new one.
The new clamp had the torque spec on the box. Can't recall but it was not much.
The old clamp had caked into the turbo and pipe so well that I had to beat it out.

[98fleetwood]

Thx everyone! Once again this group is Awesome! It ended up not being all the way seated... and there was an orange rubber o-ring on it (never looked at it that closely)..
I bought the master rebuild kit back when I rebuilt the engine... looked through my left over gaskets and there was an o-ring... didn't look bad but I replaced it anyway... no leaks now!